An Automated External Defibrillator (AED) is a first-aid device that automates the process of diagnosing life-threatening cardiac arrhythmia and performing defibrillation. Previously tagged as emergency=aed or medical=aed.

A fire hydrant is an active fire protection measure, and a source of water provided in most urban, suburban and rural areas with municipal water service or other water source to enable firefighters to tap into the municipal water supply to assist in extinguishing a fire.